Official: Plutonium detected in black substance from Minamisoma (PHOTOS)
Comments by Koichi Oyama translated by Fukushima Diary:
- Sample was taken after decontamination.
- The sample contains soil, sand, and water other than black substance. (Water ratio is not announced.)
- Sample to consist of only black substance and water (Moisture content = 71.4%) contains 309,000 Bq/Kg of cesium and it’s 1,080,000 Bq/Kg when it’s dry. It therefore will be more than 3 times higher if it doesn’t content sand, soil or water.
- Pu238/Pu239+240 used to be 0.027 before 311. This result shows it’s 0.808.
- The analysis was done by Japan Chemical Analysis Center, which is outsourced by the government.
More from Mochizuki:
- 0.038 Bq/Kg (2.47Bq/m2) of Plutonium 238 was measured in Minamisoma.
- They also measured 0.047 Bq/Kg ofPlutonium 239 and 240, and 0.73 Bq/Kg of Plutonium 241.
- 8.5 Bq/Kg of Strontium 89, and 50 Bq/Kg of Strontium 90 was also measured.
- Source: “Real” mystery black substance NOT yet measured — Possibly 20,000,000 Bq/kg of cesium — Many times more radioactive than local official’s sample — “It is too dangerous and must be analyzed by public institutions” (PHOTOS) April 29, 2012
- Massive amount of mystery black substance found on road in Minamisoma after several days of rain and snow — Emitting 50 microSv/hr (PHOTO) March 7, 2012
- Mystery: Radioactive black substance reported 25km from Fukushima — Latest measurement over 95 µSv/h — Strong alpha emitter detected (PHOTOS) February 12, 2012
- HCR: Mystery black radioactive powder detected outside school — Local official posts 3 videos of black substance (PHOTO & VIDEOS) February 24, 2012
- Source: Over 500 microSv/h detected from black substance (PHOTO) April 27, 2012